Flue-lining.



E. M. CAMPFIELD.

FLUE LINING.

APPLICATION FILED OCT. 1, tats.

Patented Dec. 26, 1916.

Attorneys 1 'tained within the cells, and to render the EDWIN M.CAMPFIELD, OF RICHMOND, INDIANA.

ELITE-LENING.

Application filed Gctober 7, 1915.

To all wit 0m it may concern:

Be it known that T, EDWIN M. CAMPFIELD, a citizen of the United States,residing at Richmond, in the county of Wayne and State of Indiana, haveinvented a new and useful Flue-Lining, (Case 13,) of which the followingis a specification.

This invention relates to fine linings and is more especially animprovement upon the structure disclosed in my co-pending application,Serial No. 105,663, filed June 24:, 1916, one of the objects of theinvention being to provide a cellular lining the walls of which are sotreated as to render them nonporous, thus to materially reduce thetransmission of heat to the bodies of air con lining more efficient asan insulating medium than would otherwise be the case. I

A further object is to provide a lining containing small cells which aresealed, when the lining is set up for use, these cells greatly reducing,if not altogether eliminating the circulation of air within the walls ofthe lining so that the confined bodies of air become dead and the airbecomes a better insulating medium than if it should be confined inlarge bodies whereby an extensive movement or circulation of eachconfined body would be permitted.

WVith the foregoing and other objects in view which will appear as thedescription proceeds, the invention resides in the combination andarrangement of parts and in the details of construction hereinafterdescribed and claimed, it being understood that changes in the preciseembodiment of the invention herein disclosed, can be made within thescope of what is claimed, without departing from the spirit of theinvention.

In the accompanying drawings the preferred form of the invention hasbeen shown.

In said drawings:Figure 1 is a longitudinal section through interfittingsections of a flue lining embodying the present improvements. Fig. 2 isa section on line AB Fig. 1.

Referring to the figures by characters of reference 1 designates theouter member of a flue lining section, this member being of any desiredcross-sectional contour. The said member is made of ceramic material orany plastic fire resisting material, the inner and outer faces of themember being rendered nonporous in any suitable manner, as by providingthem with glazed finishes. The

Epecification of Letters Patent.

Patented Dec. 2%, 19 16.

Serial No. 54,696.

inner member 2 of each flue lining section is made of asimilar materialand is provided, at one end with an outturned flange 3 extendingentirely therearound. Longitudinal ribs 4} are formed along the outerface of the member 2 and extend from the flange 3 at one end of themember to the other end of said member. The outer faces of these ribsand of the flange are disposed in the same plane and are adapted, whenmember 2 is inserted in member 1, to fit snugly against the innersurface of the member 1, thus to provide a flue lining section havingair spaces or cells 5 between the two members and the ribs. The outerface of the member 2 and the faces of the ribs thereon are all renderednon-porous, as by glazing so that when the two members are assembled onewithin the other the walls of the air cells therebetween will becompletely glazed, thus to prevent air from seeping through the wallsfrom the interior of the lining to the air cells and from said air cellsto the exterior of the lining.

In using the flue lining, the inner and outer members are assembled toform a complete section, the inner member being positioned with itsupper or flanged end below the upper end of the outer member so that asocket 6 will be provided above the inner member and within the upperportion of the outer member. A suitable cement, indicated at 7, isplaced on the upper ends of the two members 1 and 2 thus assembled,after which the inner member 2 of the next adjoining section is placedin the socket 6 and on the cement 7 while the outer member 1 of the nextadjoining section thereabove is placed on the cement on the lowermember 1. Thus another socket 6 will be formed. The foregoing operationcan be continued until the lining has been set up throughout therequired height. It will be noted that the members of the two sectionscome together at points out of alinement and that the air cells of eachsection are continued downwardly into the socket in the next adjoiningsection so as thus to constitute means for insulating the joints betweenthe outer members of the sections.

It has been found in practice that a flue lining constructed as hereindescribed and assembled in the manner pointed out, constitutespractically a perfect insulating medium. The non-porous faces of themembers of the sections prevent the air from seeping through the Walls,as beifore eX- plained. This treatment of the Walls of the memberslikewise reduces'the conduction air being so small that little if anycirculation thereof Will he set up.

Although the members of the flue lining have been described as providedwith glazed surfaces whereby the pores are sealed, it is .to beunderstood that enamel could also be used.

Instead of vutilizing the cells for holding dead air, they may be packedWith particles of cork, asbestos or other non-conductors of heatsuitable for the uses to which the flue V lining is put. I

lVhat is claimed is v V A flue lining section including an Outer member,a separate inner member having an outstanding flange extendingcontinuously around one end portion thereof and of uniform Width andlongitudinal ribs extending longitudinally along the outer sides of theinner member and merging at one end into the flange, said flange and theribs fitting snugly against the inner faces of the Wall of the outermember to form non-commun1- eating longitudinal air cells open at oneend and closed at thelr outer ends, the flanged end of the inner memberbeing arranged 'withm the outer memberandbetween the ends of said outermember thereby to form a seat in one end of the lining section.

In testimony that I claim the foregoing as my own, I have hereto aflixedmy signature in the presence of two itnesses.

V EDWINMQCAMPFIELQ Witnesses:

IVY E. SIMPsoN, PHILOMENA A. RooKE LI.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

, Washington, D. G. V I V

